Linux初始化系統盤后重新掛載數據盤方法

2024-09-05 23:05:08

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Linux實例初始化系統盤后重新掛載數據盤

在Linux實例中，重新初始化系統盤不會改變數據盤里的內容，但是數據盤的掛載信息會丟失，所以，在Linux重啟后，按以下步驟創建新的掛載點信息并掛載數據盤分區。

說明：本文檔中，假設初始化系統盤之前，實例上掛載的數據盤分區名稱為/dev/vdb1，掛載點名稱為/InitTest。

查看數據盤掛載信息：運行命令 mount。返回結果中沒有/dev/vdb1的信息。

sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)devtmpfs on /dev type devtmpfs (rw,nosuid,size=497476k,nr_inodes=124369,mode=755)securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)tmpfs on /run type tmpfs (rw,nosuid,nodev,mode=755)tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755)cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd)pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_prio,net_cls)cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct,cpu)cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)configfs on /sys/kernel/config type configfs (rw,relatime)/dev/vda1 on / type ext4 (rw,relatime,data=ordered)systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=29,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=9791)hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime)mqueue on /dev/mqueue type mqueue (rw,relatime)debugfs on /sys/kernel/debug type debugfs (rw,relatime)tmpfs on /run/user/0 type tmpfs (rw,nosuid,nodev,relatime,size=101620k,mode=700)

查看數據盤分區信息：運行命令 fdisk -l。

Disk /dev/vda: 42.9 GB, 42949672960 bytes, 83886080 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk label type: dosDisk identifier: 0x0008d73aDevice Boot   Start     End   Blocks  Id System/dev/vda1  *    2048  83884031  41940992  83 LinuxDisk /dev/vdb: 25.8 GB, 25769803776 bytes, 50331648 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk label type: dosDisk identifier: 0xfe6d77c1Device Boot   Start     End   Blocks  Id System/dev/vdb1      2048  50331647  25164800  83 Linux

重新創建數據盤分區的掛載點：運行命令